The Investment Company Institute's latest weekly "Money Market Fund Assets" report shows money fund assets surging higher by $19.9 billion to a record $7.385 trillion, the 3rd straight week of gains and the 11th increase in the past 12 weeks. MMFs rose $50.5 billion the prior week, after rising $31.2 billion two weeks prior. MMF assets are up by $911 billion, or 14.1%, over the past 52 weeks (through 10/8/25), with Institutional MMFs up $529 billion, or 13.7% and Retail MMFs up $381 billion, or 14.6%. Year-to-date, MMF assets are up by $535 billion, or 7.8%, with Institutional MMFs up $283 billion, or 6.9% and Retail MMFs up $252 billion, or 9.2%. ICI's weekly release says, "Total money market fund assets increased by $19.84 billion to $7.39 trillion for the week ended Wednesday, October 8, the Investment Company Institute reported.... Among taxable money market funds, government funds increased by $15.60 billion and prime funds increased by $3.00 billion. Tax-exempt money market funds increased by $1.25 billion." ICI's stats show Institutional MMFs increasing $10.1 billion and Retail MMFs increasing $9.8 billion in the latest week. Total Government MMF assets, including Treasury funds, were $6.034 trillion (81.7% of all money funds), while Total Prime MMFs were $1.211 trillion (16.4%). Tax Exempt MMFs totaled $140.6 billion (1.9%). It explains, "Assets of retail money market funds increased by $9.78 billion to $2.99 trillion. Among retail funds, government money market fund assets increased by $4.36 billion to $1.88 trillion, prime money market fund assets increased by $3.39 billion to $981.62 billion, and tax-exempt fund assets increased by $2.03 billion to $127.85 billion." Retail assets account for 40.4% of the total, and Government Retail assets make up 62.9% of all Retail MMFs. They add, "Assets of institutional money market funds increased by $10.06 billion to $4.40 trillion. Among institutional funds, government money market fund assets increased by $11.23 billion to $4.16 trillion, prime money market fund assets decreased by $391 million to $229.34 billion, and tax-exempt fund assets decreased by $780 million to $12.75 billion." Institutional assets accounted for 59.6% of all MMF assets, with Government Institutional assets making up 94.5% of all institutional MMF totals. According to Crane Data's separate Money Fund Intelligence Daily series, money fund assets have increased by $64.4 billion in October to a record $7.772 trillion (through 10/9). Assets increased by $105.2 billion in September, $132.0 billion in August, $63.7 billion in July, $6.7 billion in June and $100.9 billion in May. They fell by $24.4 billion in April, but rose $2.8 trillion in March, $94.2 billion in February and $52.8 billion in January. They jumped $110.9 billion in December, $200.5 billion in November, and $97.5 billion last October. Note that ICI's asset totals don't include a number of funds tracked by the SEC and Crane Data, so they're almost $400 billion lower than Crane's asset series.
